Alarm mechanism.



0. H. HYDEP ALARM MECHANISM. APPLICATION FILED APR.27,1912.

1,049,303. Patented Dec. 31, 1912.

WITNESSES: lNVE/V TOR M I I K05 [rm/mus I COMPANY, OF WINSTED, CONNECTICUT, A CORPORATION OF CONNECTICUT.

ALARM MECHANISM.

Specification of Letters Patent. Application filed. April 27, 1912.

1,049,303. Patented Dec. 31,1912.

Serial No. 693,673.

To all whom it may concern."

Be it known that 1, CHARLES H. HYDE, a citizen of the United States, residing at lVinsted, county of Litchfield, State of Con- J ournaled in the framing 12 is an alarm set staff 11 carrying at its outer end beyond arm 12 which cooperates with an alarm dial the dial face 3 of the clock an indicator necticut, have invented certain new and on the dial face 3 in the usual manner. Rouseful Improvements in Alarm Mechanism, tatably and slidably mounted on the set of which the following is a full, clear, and staff 11 between the front wall 1 of the casexact description. ing and the front dial face 3 ofthe clock, This invention relates to alarm mechais a hub member 13 provided with a gear nism for clocks and is designed to combine 14 engaging with the clock hand gearing simplicity of structure with accuracy and and properly synchronized therewith. The reliability of operation. outer edge of this hub member 13 is pro Broadly stated the invention comprises a vicled with a cam edge 15 having a shoulder spring pressed latch adapted to be moved 15 formed thereon. Fixed to the set-staff from looking to unlocking position with ref- 11 at the outer or cam face of the hub 13 erence to the alarm mechanism of the clock, is a collar 16 having an arm 16 extending such movement being effected through time therefrom and adapted to engage with the controlled means. outer edge of hub 13. Between the rear face I have illustrated in the accompanying of the hub member 13 and the front wall 1 drawings a preferable embodiment of my of the casing, a yoke member 17 is slidably invention in connection with a well known mounted on the set-staff 11, its front face form of clock mechanism. bearing against the hub member 13 and its In the drawings :Figure 1 is a face view rear face being engaged by a coiled spring of an alarm clock equipped with the alarm 18 mounted on the set-staff 11 between the mechanism of my invention, parts being yoke 17 and the front wall 1. This coiled 50 broken away to disclose the application of spring normally tends to force the yoke 17 my device to the alarm mechanism. Fig. 2 and gear carrying hub 13 outwardly against is a view in elevation of that part of the the arm 16 of the collar 16 which is fixedly clock mechanism provided with the alarm Secured to the set-staff 11. mechanism, certain parts of the frame being The yoke 17 is double-armed, one arm 19, shown in section. Fig.3 is a vertical secwhich I will term the alarm locking arm, tion on the line 33 Fig. 2, part of the extending inwardly from the yoke through framing being broken away to illustrate a guiding recess 1 in the front wall 1 of the alarm escapement. the frame and being adapted to be posi- Referring to the drawings by numerals, 1 tioned in the path of oscillating movement 99 indicates the front wall and 2 the rear wall of the hammer arm 7 a to thereby lock the of the casing containing the clock mechasame against bell tapping oscillation. At nism, 3 the dial face of the clock, and 1 the its opposite end the yoke 17 is provided with alarm bell thereof. Mounted in the upper a similar and second arm 20 which exportion of the framing between the front tends through a guiding aperture 1 formed and rear walls 1 and 2 thereof, is a spindle in the front wall of the frame and serves to 5 carrying a sleeve 6 fixed thereon A hamguide and retain the yoke in proper coopermer staff 7 is secured to the sleeve section ative relation with the alarm mechanism. 6 and extends upwardly therefrom to apoint The yoke being formed with two similar adjacent the bell 4. From this sleeve and arms, either one of these arms can be used extending downwardly therefrom is an arm for the alarm lock or the guide arm. 7 a forming an extension of the hammer stafi With the foregoing in mind, the operaand having its end positioned for cooperation of the device is as follows: The alarm tion with the lock mechanism forming the set-staff 11 is turned by hand to bring its subject-matter of my invention. The hamindicator 12 opposite the hour at which it is 1% mer staff is given the usual oscillatory videsired to operate the alarm mechanism, the brating movement by means of suitable arm 16 being parallel with and moving escapement mechanism 89 oscillating the with the indicator. The gear 14, being synspindle 5 and sleeve 6, and suitably driven chronously geared to the time mechanism, through a coiled spring 10. rotates and brings its shouldered portion 15 1 e time at which the indicator 12 has been set, the coiled spring 18 pressing the cam edge 15 against this arm as the hub is rota ted by the gear 14 and the yoke 17 with its arms 19 and 20 being pressed inwardly mechanism against movement.

shouldered portion 15 reaches the arm 16 of collar to lock the alarm iVhen the of the cam edge 16, the coiled spring 18 snaps the yoke 17 and hub mem ber 13 forwardly to bring the the cam edge 15 against the arm 1 low point of This withdraws the locking arm 19 from locking engagement with the arm 7 of the hammer whereupon the alarm operatlve and is free to to sound the alarm unt mechanism becomes operate the hammer il either the spring runs down or the continued rotation of gear 14- rides the arm 16* of the hub and forces against the tension of th thereby bring the latch up over the cam edge the latter inwardly e coiled spring 18 to arm 19 of yoke 17 into cooperative engagement with arm 7 of the alarm hammer.

lVhile I have described and illustrated my alarm mechanism in connectlon with a spe cific form of time cont alarm escapement and h sire to be understood as rolled actuator and ammer, I do not delimiting my invention to use with such specific structures but may, on the same the contrary,

to various structures modify and adapt within the spirit of my invention and of the appended claims.

hat I claim therefo cure by Letters Patent i re and desire to ses:

1. In a clock, a frame, alarm mechanism carried thereby, an alarm set-staff carried by said frame, a spring actuated yoke mounted on said staff provided with an arm guided in said frame and adapted to be positioned to lock and unlock said alarm mechanism, a

time movement carried by said frame, and

timecontrolled means mounted on said staff and adapted to position said yoke arm in alarm locking and unlocking position.

2. In a clock, a frame, alarm mechanism carried thereby, an alarm set-staff carried by said frame, a yoke staff provided with an fame and adapted to b mounted on said setarm guided in said e positioned to lock and unlock said alarm mechanism, a spring connected to said yoke and tending to move said arm to alarm unlocking position, a time movement carried by said frame, and timecontrolled actuating means mounted on said set-staff in cooperative relation with said yoke and adapted to hold said yoke arm in alarm locking position and to be actuated to permit said spring to move said yoke to alarm unlocking position.

3. In a clock, a frame, alarm mechanism carried thereby, an alarm setstaff carried by said frame, a yoke slidably mounted on said set-staff and provided with-a pair of arms guided in said frame, one of said arms bein adapted to be positioned to lock and unlocE said alarm mechanism, a spring mounted on said set-staff and normally tending to move said yoke to alarm unlocking position, and time-controlled means mounted on said set-staff in cooperative relation with said yoke and adapted to retain it in alarm locking position and to be so positioned at a time certain to permit said spring to actuate said yoke arm to alarm unlocking position.

4. In a clock, a frame, alarm mechanism carried thereby, an alarm set-staff carried by said frame, a yoke mounted on said setstaff and having extending from opposite ends thereof a pair of arms guided in said frame and preventing rotary movement of said yoke relative to said set-staff, said arms being adapted to be positioned interchangeably and one of said arms being adapted to be positioned to lock and unlock said alarm mechanism, a coiled spring mounted on said set-staff and normally tending to move said yoke to alarm unlocking position, and timecontrolled means mounted on said set-staff in cooperative relatio with said yoke and adapted to retain it in alarm locking position and to be so positioned at a time certain to permit said spring to actuate said yoke arm to alarm unlocking position and to return it to alarm locking position.

CHARLES H. HYDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

